Arnold said since taking the Socceroos head coaching role after last year's World Cup in July, he had scouted between 60 and 70 Australian players.

"I truly believe there is great depth," he said.

"And some great individual players that will make the team and the squad extremely strong going into this World Cup campaign which starts in September.

"I have a great amount of belief and confidence in these boys."

But Arnold won't be giving away international caps for the sake of it.

"I respect the badge and I respect the honour of playing for the Socceroos more than anyone," he said.

"And the boys have to deserve and earn those caps.

"We have got number of experienced players here as well as younger players.

"The whole purpose of this game is if we lose our whole frontline again like we did at the Asian Cup (last January), that we will have the depth and the quality to replace that through the World Cup qualifiers."